MUMBAI (Reuters) - Opening batsman Shikhar Dhawan and seamer Bhuvneshwar Kumar have been dropped from the top rank of India's annual contracts with the board showing faith in young wicketkeeper-batsman Rishabh Pant by handing him the second-most lucrative retainer.BCCI's retainer structure has four grades with the top "A+" category, which was introduced last year, worth 70 million rupees ($998,730) a year.Skipper and batting mainstay Virat Kohli, opening batsman Rohit Sharma and pace spearhead..